Determination of the Parameters of the Two-Parametric Fracture Mechanics along the Crack Front Based on the Digital Image Correlation Data


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Abstract

A mathematical processing technique and an algorithm for the numerical correction of experimental displacement fields on the specimen surface in the vicinity of a crack tip with consideration of the displacement of a body as a rigid whole under its loading and the actual position of a crack tip were proposed. The initial experimental displacement fields in the vicinity of a fatigue crack tip of a compact specimen were determined by digital image correlation. This approach was successfully used for a compact specimen and the possibility of its expansion to obtain the distributions of the stress intensity factors and the nonsingular T stresses along the spatial crack front was shown.

About the authors

A. S. Chernyatin

Bauman Moscow State Technical University; Blagonravov Mechanical Engineering Research Institute

Author for correspondence.
Email: cas@inbox.ru
Russian Federation, Moscow; Moscow

Yu. G. Matvienko

Blagonravov Mechanical Engineering Research Institute

Email: cas@inbox.ru
Russian Federation, Moscow

P. Lopez-Crespo

University of Malaga

Email: cas@inbox.ru
Spain, Malaga

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